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KornShell (ksh): Both firstvar and secondvar are available within the loop. Only secondvar is available outside the loop. Bash (bash): Both firstvar and secondvar are available within the loop. Only secondvar is available outside the loop. This version now performs in the same manner as the ksh version. Public Domain Korn Shell (pdksh): Both firstvar and secondvar are available within the loop. Only secondvar is available outside the loop. Bourne (sh): Both firstvar and secondvar are available within the loop. Neither variable is available outside the loop.

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Oracle recommends that you avoid delimited fields and choose positional fields (using the POSITION parameter) where possible. Choosing positional fields means that the database avoids scanning the data file to find the delimiters you chose, thus reducing processing time.

You can apply SQL functions to the field data before loading it into table columns. Only SQL functions that return single values can be used for transforming field values in general. The field should be denoted inside the SQL string as field_name. You specify the SQL function(s) after you specify the data type for the field, and you enclose the SQL string in double quotation marks, as shown in the following examples: field_name CHAR TERMINATED BY "," "SUBSTR(:field_name, 1, 10)" employee_name POSITION 32-62 CHAR "UPPER(:ename)" salary position 75 CHAR "TO_NUMBER(:sal,'$99,999.99')" commission INTEGER EXTERNAL "":commission * 100" As you can see, the application of SQL operators and functions to field values before they are loaded into tables helps you transform the data at the same time you are loading it. This is a handy feature.

SQL*Loader allows you to specify a number of runtime parameters at the command line when you invoke the SQL*Loader executable. Usually, you specify in the parameter file those parameters whose values remain the same across jobs. You can then use the command line to start the SQL*Loader job, either interactively or as part of a scheduled batch job. On the command line, you specify runtime-specific parameters, along with the control filename and location. As an alternative, you may use the OPTIONS clause of the control file to specify runtime parameters inside the control file itself. You can always specify a number of runtime parameters while invoking SQL*Loader, but you re better off using the OPTIONS clause to specify them in the control file, if those parameters are something you ll repeat often. Using the OPTIONS clause comes in handy particularly if your SQL*Loader command-line specification is so long that it exceeds your operating system s maximum command-line size.

Specifying a parameter on the command line will override the parameter s values inside a control file.

The following sections cover some of the important parameters you can control using the OPTIONS clause in the control file.

This last option removes the pipe (|) from the loop and processes an input file manually. If you have only the Bourne shell at your disposal, this is your only option, and the script will be somewhat slower. With this option, all set variables from both inside and outside the loop will be available following loop completion. This option is valid for all the shells I ve mentioned.

The USERID parameter specifies both the username and the password of the user in the database who has the privileges for the data load: USERID = samalapati/sammyy1

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